Road-grader.



'PATENTED APR. 14, 1908.

W. s. LIVENGOOD.

ROAD GRADER.

APPLIGATION FILED 113.23, 190s.

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Nd. 884,396. PATENTED' APR. 14, 1908.

. w. s. LIVENGOOD.

ROAD GRADER. ATPLIOATION FILED r1113. 2a, 1906.

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In venfor,

' No. 884,396. PATENTED APR. '14 1908,

- w. s. LIVENGOOD.

ROAD GRADE IR. APPLICATION FILED FEB. 23, 1906.

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Inveniar:

Wnfield LS1 Livmyoqd THE Ncmns PrrEas co.. l'usyuvamn, n. c.

UNITED STATES PATENT OFFICE.

WINFIELD S. LIVENGOOl), OF KANSAS CITY, MISSOURI, ASSIGNOR TO SMITH &SONS MFG.

00., OF KANSAS CITY, MISSOURI.

ROAD-GRADER.

Specification of Letters Patent.

Patented April 14, 1908.

Application filed February 23, 1906. Serial No. 302,409.

To all whom it may concern.

Be it known that I, WINFIELD S. LIVEN- GOOD, a citizen of the UnitedStates, residing at Kansas City, in the county of Jackson and State ofMissouri, have invented certain new and useful Improvements inRoad-Graders, of which the following is a specification.

My invention relates to improvements in road-scrapers or graders, andconsists of an adjustable rear axle and means for controlling same,whereby said axle, and the wheels mounted thereon, may be swung and heldobliquely to the line of draft and thus counteract the tendency of thescraper-blade to push the rear portion of the machine laterally to saidline of draft.

The invention further consists of an adjustable seat pivoted to the rearportion of the machine and arranged adjacent to the hand-wheels foradjusting the scraper-blade, so that an operator may adjust the latterwithout leaving the seat.

In order that the invention may be fully understood, reference will nowbe made to the accompanying drawings, in which Figure 1 represents aplan view of the rear portion of a road-grader provided with myimprovements. Fig. 2 is a side elevation of same with means foradjusting the scraperblade ,added thereto. Fig. 3 is an enlarged brokenside elevation of the means for adj usting the rear axle obliquely tothe line of draft. Fig. 4 is a rear elevation of the ma chine showing myimprovement for adjusting the rear axle, attached thereto. Fig. 5 is asectional plan view taken on line V-V of Fig. 4. Fig. 6 is an enlargedside elevation of part of the means employed in adjusting the rear axle.Fig. 7 is a detail of a rack and pinion for laterally adjusting the rearframe upon the rear axle.

In said drawings, 1 designates the main frame of the machine andconsists of a channel-bar 1, an arch 2, secured at its lower terminalsto lugs 3, and a bolster 4, embracing the top and side portions of therear axle 5 upon which the rear wheels 6 are mounted.

Bolster 4 is contracted at its central portion 7 to snugly embrace therear axle and prevent the latter from moving bodily either forward orbackward independent of said bolster. Bolster 4 flares outwardly fromits contracted portion 7 toward its enlarged terminals 8 to permit theaxle to swing obliquely to the line of draft, as shown by full andterminal with dotted lines, Fig. 1, the contracted portion 7 acting as apivot for the axle to turn upon, said bolster, however, is adapted toslide longitudinally upon the axle when it is desired to shift the rearportion of the frame upon said axle. Axle 5 is adjusted obliquely bymeans of a compound lever 9 comprising'a primary member 10 and asecondary member 11. Member 10 is much longer than member 11 in order toobtain the requisite leverage and is fulcrumed upon a bolt 13 projectingoutwardly from one of lugs 3 as shown in Fig. 4. Member 10 is looselymounted upon said bolt so that it may be moved inwardly or outwardly ashort distance when it is desired to engage or disengage its lug 14 fromone of the notches of a segment 15 secured to the adjacent side of thearch for the purpose of reliably holding member 10 in its adjustedposition. Member 10 is provided at its upper end with a handle 16 and isbifurcated at its lower terminal 17 in order to engage the oppositesides of a stud 18 projecting from the lower portion of member 11.

18 designates a compression spring interposed between a washer 19 andmember 10 in order to push the latter toward segment 15 and thusreliably hold lug 14 in engagement with the notches thereof. Thepressure of said spring upon member 10 is regulated by a nut 20adjustably engaging the threaded outer portion of bolt 13.

Member 11 is fulcrumed at its upper end uplon a pin 21, and comprises anarm 22 and a ead 23 which latter is provided at its lower jaws 24embracing the sides of the axle so that when said secondary member isswung either backwardly or forwardly by the primary member it will carrythe adjacent end of the axle therewith, causing the latter to turn onthe contracted portion 7. Head 23 is provided with a segmental slot 25which permits member 11 to swing upon pin 21 without interfering withbolt 13, and its jaws 24 loosely embrace axle 5 so that they may slideupon the latter when the rear portion of frame 1 is adjusted laterally.

Lateral adjustment of the rear portion of the frame is accomplishedthrough the instrumentalityof a rack-bar 26, carried by the axle, and apinion 27 meshing with said rack-bar. Pinion 27 is fixed upon the lowerterminal of a shaft 28, journaled in bearings 29 30 and provided at itsupper terminal with a fixed hand-wheel 31 whereby said pinion isrotated. Pinion 27 is held from accidental rotation by a latch 32 thelower terminal of which passes through the bolster and is adapted toengage any two teeth of said pinion, while its upper portion, extendingthrough bearing 30, is provided with a handle 33 whereby it may beraised out of engagement with said pinion. The latch is normally held ina lowered position by means of an expanison spring 34 inter osed betweena collar 35, secured to said atch, and bearing 30.

36 designates a scraper blade which is adjusted in any desired directionthrough the instrumentality of hand-wheels 37 38 and 39 and intermediatemechanism. As said scraper-blade and its 0 erating mechanism has beenfully describe in my application of June 18, 1904, #213,066, furtherdescription thereof is deemed unnecessary.

40 designates a platform sup orted by bars and braces 41 42, respectivelsecured to the rear portion of frame 1 so that an operator standing onsaid platform will be within convenient reach of the hand-wheels andhandle 16, and consequently, may adjust the scraper-blade and the rearaxle without leaving said platform. Bars 41 are secured to the undersideof bolster 4 by means of bolts 43 and extend forwardly beneath the rearaxle, thus reliably holding the bolster upon the same.

44 designates a seat provided for the convenience of the operator and inorder that it may be swung to one side when not in use, as indicated bythe dotted line a Fig. 1, I mount it upon a spring-bar 45 pivotallysecured at its forward end to the arch by means of a bolt 46. Bolt 46 isrelieved of the greater portion of the weight upon said seat by means ofa su porting-bar 47 secured to the underside of t 1e rear ortion ofchannelbar 1 by bolts 48 exten ing through spacing-sleeves 49, whichhold the supportingbar a slight distance beneath the bar 1*, and alsoact as stops for limiting the pivotal action of bar 45.

When the machine is drawn forwardly with the scraper-blade engaging thesoil and occupying the oblique positionshown in Fig. 1, it is obviousthat the resistance of the soil upon said blade, if sufficiently great,will move the rear portion of frame 1 in the direction of arrow b, causethe rear Wheels to slide laterally upon the ground, and thus prevent themachine from properly performing its work unless the pressure of thesoil is counteracted. By turning the axle in the same direction as theblade, or as near so as its limited movement will permit, the wheelswill be adjusted at an angle to the line of draft and have a tendency tomove the rear portion of the frame in a direction 0 posite to that abovereferred to, consequeniily said adjustment will effectually overcome thetendency of the soil to slide the rear wheels in the direction of arrow1).

Having thus described my invention, what I I claim and desire to secureby Letters- Patent, is

1. In a machine of the character described, a frame, an axle adjustablymounted therein, a compound lever, for adjusting said axle in ahorizontal plane, consisting of a secondary member, pivoted to theframe, jaws on said secondary member engaging the axle, and a primarymember fulcrumed upon the frame and arranged to operate the secondarymember.

2. In a machine of the character described, a frame, a rear axlepivotally and slidably mounted therein, and a lever for controlling saidpivotal movement, said lever slidably engaging the axle.

3. In a machine of the character described, a frame, a rear axlepivotally and slidably mounted therein, a lever slidably engaging saidaxle for controlling its pivotal movement and means for controlling saidsliding movement.

4. In a machine of the character described, a frame, a bolster formingart thereof, and an axle pivotally and s therein.

5. In a machine of the character described, a frame, a bolster formingpart thereof, said bolster being contracted intermediate its ends, andan axle extending through said bolster and having pivotal movement onthe contracted portion.

6. In a machine of the character described, a frame, a bolster formingpart thereof, said bolster being contracted at its central portion andflaring toward its ends, and an axle extending through said bolster andhaving pivotal movement on the contracted portion.

7. In a machine of the character described, a frame, a seat pivotallysecured to the rear portion thereof, and means for limiting said pivotalmovement.

In testimony whereof I afiix my signature, in the presence of twowitnesses.

WINFIELD S. LIVENGOOD.

Witnesses:

F. G. FISCHER, J. MOORE.

dably mounted

